~~~ group of serial numbers and totally gave up why three or more groups of numbers exist.

Historian Pascoal has shown us nacre inventory where the series was used for only two weeks out of the year during a horse race event and, we know in some jurisdictions that there was more than one gambling operation going on in the same building which, given this monogram; I wonder if it could be from NICE, since we recently found inventory from NICE, which was totally unknown to us and, where reading some casino location postcards from NICE, the term "casino" is used and not too much more.